Long single crystalline whiskers (10-200 µm diameter) were synthesized using tellurium-doped precursors. The length of these whiskers varies from less than 1 mm up to 9 mm. The thermopower and resistivity were approximately 150 µV/K and 5 mΩ-cm respectively at 325K. The thermopower was measured using a differential technique, while the resistivity was measured using a standard four-probe method. The thermal conductivity of these small samples was measured using our parallel thermal conductance technique. The total thermal conductivity was on the order of 2 Wm−1K−1.
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Bourne, D., Tang, X., Aaron, K. et al. Thermoelectric Properties of Bi2SrCo2O9 Tellurium-Doped Single Crystalline Whiskers. MRS Online Proceedings Library 886, 1108 (2005). https://doi.org/10.1557/PROC-0886-F11-08